donovan53

Hey guys, im donovan i bought my first corvette a few days ago (1988 C4 4+3) i drove it an hour and half home and it did good except for when i would go to give it more than half throttle it would stumble, so i did some research on this forum and replaced the throttle postion sensor, set it to 0.54 and now it will not run enough to even get out of the driveway. i have also replaced the 02 sensor and spark plugs and cleaned the mass air flow sensor, i also replaced both mass air flow sensor burn off relays. So i am completley stumped on what to do, i used to be able to drive it around town as long as i didnt give it WOT but now i cant even get her out of the driveway, thanks in advance
-Donovan

antfarmer2

I hope you saved all the good parts you replaced. I would test the fuel pressure. Might even just be a dirty filter. But could be the pump , sock or pulsater.

Welcome to the forum.

92ragtop

hcbph

If there's one thing I've learned, only change one thing at a time and test it thoroughly if possible. If you only change 1 thing and something happens, you only have one thing to troubleshoot.

Good luck.

geb@abq

Welcome to C4. How much did you pay for it ?? Agree, change 1 thing at a time....GOOD LUCK !!!!!!

donovan53

I got her for a great price, $2,100 i replaced the mass air flow sensor, still no luck. i have a mechanic friend coming to work on it today

xrav22

To set the .54 you need to do a full idle adjust. You really cant just set that if you need the info here it is don't skip any steps .Plus leave the voltmeter on while you tighten the tps sensor if it jumps around you need a new one.
http://www.digitalcorvettes.com/foru...ad.php?t=58873

VikingTrad3r

and dont overtighten then strip the tps bolt.

im subbed to see if your mechanic can figure it out.

id check fuel pressure then distributor cap/timing/plugs/wires